Acid into base!
i think we add acid into a base,as we can observe it in the titration process.....
Simply put, an acid donates protons ( H + ) to solutions and bases accept protons in solutions.
The clue is in the name, Stomach acid is an acid. It is Hydrochloric Acid with a pH of 2
I'm pretty sure it is an acid considering it is called 'brig acid'